resolv.bash

#!/usr/bin/env bash

declare -A Pack

function callback {
	Pack[$2]=
}

mapfile -t -c 1 -C callback < "${1?error: file missing}"
suite=${2?error: chroot of suite missing}

for i in "${MAPFILE[@]}"
do
	arr=($(
			sudo apt-rdepends \
				-r \
				-o Dir::Cache="$suite"/var/cache/apt \
				-o Dir::State="$suite"/var/lib/apt "$i" 2>/dev/null |
			grep -o -e '^[^ ]*'
		)
	)
	unset -v arr[0]
	is_dep=false
	for j in "${arr[@]}"
	do
		[[ -v Pack[$j] ]] && is_dep=true && break
	done
	$is_dep || keep+=("$i")
done

printf '%s\n' "${keep[@]}"

# vim: set ft=sh

declare -A Pack

function callback {
	Pack[$2]=
}

mapfile -t -c 1 -C callback < "${1?error: file missing}"
suite=${2?error: chroot of suite missing}

for i in "${MAPFILE[@]}"
do
	is_dep=false
	while
		IFS= read -r
	do
		[[ -v Pack[$REPLY] ]] && is_dep=true && break
	done < <(
		sudo apt-rdepends \
			-r \
			-o Dir::Cache="$suite"/var/cache/apt \
			-o Dir::State="$suite"/var/lib/apt "$i" 2>/dev/null |
		grep -o -e '^[^ ]*' |
		tail +2
	)
	$is_dep || keep+=("$i")
done

printf '%s\n' "${keep[@]}"